The Federal Communications Commission will vote Thursday on a plan that, according to Chairman Ajit Pai, will strip away regulations that prevent telcos from upgrading their networks.

But in doing so, the Republican-controlled FCC plans to eliminate a requirement that telcos provide Americans with service at least as good as the old copper networks that provide phone service and DSL Internet. The requirement relates to phone service but has an impact on broadband because the two services use the same networks.

As carriers like AT&T and Verizon turn off copper networks throughout much of the country, many people fear that the networks won't be replaced with fiber or something of similar quality. That's why the FCC in 2014 created a "functional test" for carriers that seek permission to abandon copper networks. In short, carriers have to prove that the replacement service is just as good and provides the same capabilities as what's being discontinued.